[Issue 20996] -preview=dip1021 ICE given one liner throw program

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20996

--- Comment #2 from Bruce Carneal <bcarneal11 at gmail.com> ---
*** Issue 20994 has been marked as a duplicate of this issue. ***

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